Atmospheric brake



(No Model.)

W. OHEBIN.

ATMOSPHERIC BRAKE.

No. 312,155. Patented Feb. 10, 1885.

, well be spared.

iiNrran STATES PATENT rr cn.

"WILLIAM OHERIN, OF PARSONS, KANSAS.

ATMOSPHERIC BRAKE.

SPECIFICATION forming part of Letters Patent No. 312,155, dated February 10, 1885.

Application filed September 10, 1884.

To all whom it 792607 concern.-

Be it known that I, WILLIAM OHERIN, of Parsons, Kansas, have made a new and useful Improvement in Atmospheric Brakes, of which the following is a full, clear, and exact description, reference being bad to the annexed drawings, making part of this specification, in which Figure 1 is a view/in perspective ofthe improved valve; Fig. 2, a side elevation of that portion of an atmospheric car-brake mechanism with which the improvement is immediately connected; Fig. 3, a longitudinal section of the valve opened, and Fig. 4 a longitudinal section of the valve closed.

The same letters of reference denote the same parts.

In connection with that portion ofthe mechanism of an atmospheric car-brake which is used to connect the carsnamely, the flexible tubes which project from opposingcars and are coupled together beneath the carsit has been customary to employ a cut-off valve at or in the vicinity of the inner end of each of the flexible tubes, by means of which the operator can cut off the passage of the air through the main air-tubes beneath the car. Prior to the adoption of these cutoff valves the coupling was provided with a peculiar system of valves, whose function was to close the ends, respectively, of the tubes, and prevent the escape of the air whenever the tubes were uncoupled; but the introduction ot' the cut-off valves obviated the need of a valve in the coupling. the practice now being to close the cut-01'1" valves and then uncouple the tubes. This difficulty,

however, has remained: while the closing of the cut-off valve serves to prevent the passage of the air between the main tubebeneath the ear and the flexible tube at the end of the car, the same air-pressure continues in the flexible tube between the cutoff valve and the coupling, and the same air-pressure is exerted upon the parts of the coupling as before the cutoff valve was closed. Consequently the two parts of the coupling which have to be turned upon each other to effect the uncoupling must be moved under this pressure.

v The operation of uncoupling under such conditions often requires more time than can Considerable force must also frequently be applied before the coupling parts (No model.)

can be slipped upon each other and opened apart.

To remove the objection last named, and not only enable the operation of uncoupling to be easily and rapidly accomplished, but also to provide means by which the brakes of a'car can be set in the event of its cutmff valve becoming accidentally closed, is the aim of the present improvement,which consists as follows:

,A A represent the main air-tubes of an atmospheric air-brake-such as the Testinghousewhich are extended beneath the body of the car.

B B respectively represent the flexible tubes, which extend outwardly from the main tubes A A, respectively.

0 represents the coupling used to connect the tubes B B, and D D represent the cutoff valves inserted between the tubes A and B and the tubes A and B, respectively. All these parts are of the customary form, saving the cut-off valves D D. The plug (1 of this valve has a small perforation, (1, extending transversely through one side, (i of it, so as to form a passage through which air, when the valve is closed, can escape from the tlexible tube B into the usual cross opening, (1 in the center of the plug, and the shell (1* of the valve also has a small perforation, d through which air, when the valve is closed, can pass from the space d to the outer air. At the same time the escape of the air from the main tube A is cut off. This position is shown in Fig. t. When the valve is opened, as shown inFig. 3, it will be seen that the passages (25' d are closed. cut-oif valves D D are closed the air remaining in the flexible tubes is exhausted therefrom through the passages d (MP in the valves D D. respectively, to the outer air, and the equilibrium is established upon both sides of the coupling, whereupon the uncoupling can be effected rapidly and easily.

I claim- The tubes A A, the flexible tubes B B, the coupling 0, and the cut-off valves D D, having the passages d (i combined and operated substantially as described.

NVILLIAM O HEBIN.

Witnesses:

T. S. MoDownLL, R. D. TALBOT.

The result is, that whenever the 

